UBUNTU-CVE-2020-27783

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    UBUNTU-CVE-2020-27783

    Published: 3 Dec 2020Last Modified: 4 Feb 2026
    Upstream:
    CVE-2020-27783

    Summary:

    Details: A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.

    References: https://ubuntu.com/security/CVE-2020-27783, https://github.com/lxml/lxml/commit/89e7aad6e7ff9ecd88678ff25f885988b184b26e, https://ubuntu.com/security/notices/USN-4666-1, https://ubuntu.com/security/notices/USN-4666-2, https://www.cve.org/CVERecord?id=CVE-2020-27783

    Affected packages

    Package

    Name: lxml

    Purl: pkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.3.3-1ubuntu0.2+esm2

    Affected versions

    3.2.0-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2020-27783 | CVE-DB